OpenSSL::SSL::SSLError (hostname was not match with the server certificate):

OpenSSL::SSL::SSLError (hostname was not match with the server certificate):

Tive essa mensagem no Rails 2.2.2 gerada pelo ActionMailer.

Parece que essa versão tenta automaticamente conectar no smtp
usando SSL, foi feito um fix porém para a versão 2.3, não disponível
na versão 2.2.2

no arquivo "config/enviroment.rb" inserir

#=======================================

if RAILS_GEM_VERSION == '2.2.2'
module ActionMailer
  class Base

    def perform_delivery_smtp(mail)
      destinations = mail.destinations
      mail.ready_to_send
      sender = mail['return-path'] || mail.from

      smtp = Net::SMTP.new(smtp_settings[:address], smtp_settings[:port])
      smtp.enable_starttls_auto if smtp_settings[:enable_starttls_auto] && smtp.respond_to?(:enable_starttls_auto)
      smtp.start(smtp_settings[:domain], smtp_settings[:user_name], smtp_settings[:password],
            smtp_settings[:authentication]) do |smtp|
              smtp.sendmail(mail.encoded, sender, destinations)
            end
     end
  end
end
else
raise "you forgot to remove the ActionMailer monkey patch!"
end

#=======================================

e nas configuracoes do ActionMailer,...

adicionado o parâmetro enable_starttls_auto
#=======================================

config.action_mailer.smtp_settings = {
   :domain               => 'domain.com',
 :address              => 'localhost',
 :port                 => 25,
 :user_name            => 'user',
 :password             => 'passwd',      
 :authentication       => :login,
 :enable_starttls_auto => false
}
#==========================================


post_original:
http://rails.lighthouseapp.com/projects/8994-ruby-on-rails/tickets/1731-make-enable_starttls_auto-opt-in-in-actionmailer